/Engine/Source/Runtime/Engine/Public/CanvasRendererItem.h
Renders the canvas item. Iterates over each triangle to be rendered and draws it with its own transforms
true if anything rendered
virtual bool Render_RenderThread ( [FCanvasRenderContext](API\Runtime\Engine\FCanvasRenderContext) & RenderContext, [FMeshPassProcessorRenderState](API\Runtime\Renderer\FMeshPassProcessorRenderState) & DrawRenderState, const [FCanvas](API\Runtime\Engine\FCanvas) * Canvas )